Malicious PDF — malware analysis report

Static analysis result for SHA-256 03109b913e1e2708…

MALICIOUS

PDF

98.6 KB Created: 2021-06-30 20:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: ab351e9828194cb41526b252bab6e285 SHA-1: 942a0a7673ca957f154f004fe297df832e71cae1 SHA-256: 03109b913e1e2708e86f4a4258aa0335955494951961fe9ddd3454c0be5f8050
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. These links likely serve to redirect users to malicious content or phishing pages, aligning with a phishing attack pattern. The presence of multiple links on disposable or compromised hosting suggests an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089feb3c6c1d---livafeniporonoligis.pdf In PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9eb055f06---70385021661.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/bomaragekubotudedelid.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/82405603762.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093b75da2d0a---fubaguzifipozate.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16084ca719cdde---29920508172.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/984f65dd9a7808a691f4404513312c2e/17014105723.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acbcadc9704---bimoguriwate.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/pgfq03nfd2a00jklgfvucqp93l/21477665771.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/l3p467773lopho3h4o001jqc9k/1318933383.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/rulubopizuserazunubotuli.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/30cf7770614e547b1d6f8ee7b074d0ac.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/riwelipamabimegetugi.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a281e6506e3---wavuxogegitug.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/76d46963a4ff20436daa519b75faca13/welevepidotumawofaneked.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021051919062073499.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160915778bc8a9---33298276331.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/41091940069.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076f50733832---jujanoruvuxuxopitime.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ddc762273---buvopele.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/ued34t9ub1tl88aq2ls6julop1/36244608628.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786512660cc---79447702135.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/47244866986.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/kepon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=clash+of+clans+town+hall+9+farming+basePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3A 11208 bytes
SHA-256: 0f6096ddac8532bb28310151ecf4fa69460f490c15ae1a5ace554f710a28a978
font_01_sfnt_off0001356b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356B 18164 bytes
SHA-256: 7b19ae9b7d1c15adf916f5b4bf369308f3e599fd17a3e8b740866277bea13099
font_02_sfnt_off000164df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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